Entra Connect Sync 2.5.190.0 reaches end of support

Entra IDActive Directory

Who is affected

Sync servers still on Entra Connect Sync 2.5.190.0. Version 2.6.1.0 follows on 10 Mar 2027; each 2.x version retires 12 months after a newer one is released.

What to do

1. Upgrade to the latest Entra Connect Sync release from the Microsoft Entra admin center.
2. If you edited miiserver.exe.config, check the known upgrade issue on the version history page first.

Source

Retiring Microsoft Entra Connect 2.x versions (columns: version, end of support date, release date)“2.5.190.0 | 02 Feb 2027 (12 months after release of 2.6.1.0) | 19 Nov 2025”

Retiring Microsoft Entra Connect 2.x versions (columns: version, end of support date, release date)“2.6.1.0 | 10 Mar 2027 (12 months after release of 2.6.3.0) | 2 Feb 2026”

Checked 9 Nov 2026 Link to this deadline